package org.learn.intermediate.com.modifier;

public class A {


    //四个属性
    public int n1 = 100;
    protected int n2 = 200;
    int n3 = 300;
    private int n4 = 400;
    public void m1(){
        //该方法可以访问到四个属性
        System.out.println(n1 + n2 + n3 +n4);
    }

}
